diffusionellt

Diffusionellt is an adjective used in Swedish to describe phenomena, processes, or properties that relate to diffusion. Diffusion is the net movement of particles from regions of higher concentration to regions of lower concentration, driven by concentration gradients and random molecular motion.

The mathematical framework rests on Fick's laws. Fick's first law states that the diffusive flux J is proportional to the gradient of concentration, J = -D ∇C, where D is the diffusion coefficient. Fick's second law governs the time evolution of concentration: ∂C/∂t = D ∇^2 C for simple homogeneous media. Temperature, solvent viscosity, and molecular size influence D.

In practice, diffusionell transport occurs in liquids, gases, solids, and porous media. In porous materials, the effective diffusion Deff is reduced by porosity and the tortuosity of the path. In biological systems, diffusion interacts with membranes and active transport, determining nutrient and gas exchange.

Applications include chemical engineering, environmental science, materials science, biology, and medicine. Diffusion is essential to processes such as pollutant spread in soil, drug delivery, and the microstructure of polymers. Diffusion-weighted magnetic resonance imaging (diffusion-weighted MRI) exploits water diffusion to probe tissue structure.

Diffusionell analysis often leads to partial differential equations describing concentration fields and to transport models such as advection–diffusion equations, which combine diffusion with bulk movement. Understanding diffusionell behavior is fundamental to predicting how substances spread, mix, and react in natural and engineered systems.